The soreness, swelling and pain on both sides of the waist in men may be caused by the following reasons: 1. It may be caused by lumbar muscle strain, which is common in men who work long hours sitting and standing or repeatedly bend over to lift heavy objects, which may gradually produce fatigue damage to the lumbar muscles and then lead to symptoms such as soreness, swelling and weakness on both sides of the waist. 2. This kind of disease is very common in elderly male patients, once the onset of this disease will produce soreness, swelling and pain in the above-mentioned areas. The company’s main business is to provide a wide range of products and services to the public.